Given it's from a research paper by the main climate change scientists (Kaufman, Mann et al) it has cred and shows they aren't the "alarmists trying to take over the world" loopy neo-cons claim them to be. I'm sure the Andrew Bolt types will still be busily twisting what the research paper says and claim this is 'proof' from the chief climate scientists themselves that AGW isn't happening and it's all a hoax
. As the paper says the west went through a similar phase post WW2 up to the 1970s where smog was countering AGW until we cleaned up the smog for health reasons and the AGW became evident as the dominating factor. China given their more recent surge in economic growth likewise now wants to clean up the smog choking their major industrial cities.
2009-10 has seen global temp. head up again so it still means we need to reduce our CO2 emissions. Acid rain is hardly a 'cure' for AGW.